Two heavy, sealed, plastic tubs are salvaged from a light aircraft in a remote part of the Celebes Sea, off the coast in Indonesia. Within hours of informing the authorities, strangers are asking about the whereabouts of the salvers and their boat. Jack Collier and Sandro Calovarlo, co-owners of the fledgling Marine Salvage & Investigation Company, are thrust into a deadly 'cat and mouse' game. They face ruthless opponents, both above water and below, who want to retrieve the tubs... at any cost. Overdue will take you from the Celebes Sea to the Caribbean, from Jakarta to Manchester and a whole new world in between.About the Author: Dr Fred Lockwood is Emeritus Professor of Learning and Teaching, Manchester Metropolitan University, UK. He is also a PADI Master Scuba Diver. His career in higher education involved consultancies within over 100 universities in more than thirty counties. Fred has travelled extensively and dived in the waters of Central America and Africa, the Middle East and South East Asia, Australasia and the Pacific Islands. Once a keen runner and squash player, he is now an equally keen cyclist, walker, skier and diver. He lives in Northamptonshire with his wife, Beryl.